"use strict";

/*
 * Copyright (c) 2004-2013, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


dhis2.util.namespace('dhis2.trigger.funcs');

/**
 * Binds a function to be invoked for a given key. Any number of functions can
 * be set for a key. A function should return true or false.
 */
dhis2.trigger.bind = function( key, func ) {
  var funcs = dhis2.trigger.funcs[key] || [];
  funcs.push(func);
  dhis2.trigger.funcs[key] = funcs;
};

/**
 * Invokes functions bound to the given key. A function can short-circuit the
 * invocations by returning false.
 */
dhis2.trigger.invoke = function( key, args ) {
  var funcs = dhis2.trigger.funcs[key];
  var result = true;

  if( funcs !== undefined ) {
    $.each(funcs, function( index, func ) {
      if( $.isFunction(func) ) {
        result = func(args);

        if( result === false ) {
          return false; // Break loop
        }
      }
    });
  }

  return result;
};
